/*
 * Copyright (c) 2010, Andrea Palloni
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 * - Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 * - Neither the name of the copyright holder nor the names of its contributors may be used
 * 	  to endorse or promote products derived from this software without specific prior written
 *    permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package net.palla.biblio.server.dao;

import javax.jdo.PersistenceManager;

import net.palla.biblio.server.entity.BookEntity;


/**
 * Represents a Dao for the Book entities
 * @author andrea
 *
 */
public class BookDao extends BaseDao {

	//public static String ENTITY_CLASS = "Book";
	public class BookVerifier {

		public void verify(BookEntity book) throws Exception {
			if (book.getTitle() == null) throw new Exception("Book must have a title");
			if (book.getCdd() == null) throw new Exception("Book must have a Dewey Code");
		}
	}
	
	@Override
	protected Object doBeforePost(PersistenceManager pm, Object o) throws Exception {
		if (o.getClass() != BookEntity.class)
			throw new Exception("Class MUST be of type " +BookEntity.class.getName());
		BookEntity book = (BookEntity)o;
		BookVerifier v = new BookVerifier();
		v.verify(book);//Verifies data Correctness;		
		return book;
	}

	@Override
	protected void doBeforeDelete(PersistenceManager pm, Object o) throws Exception {
		return;		
	}

	@Override
	protected void doAfterDelete(PersistenceManager pm, Object o) throws Exception {
		// TODO Auto-generated method stub
		
	}

	@Override
	protected Object doAfterPost(PersistenceManager pm, Object old, Object n) throws Exception {
		// TODO Auto-generated method stub
		return n;
	}

	
}
